IE36641L - Films of plastics materials - Google Patents

Films of plastics materials

Info

Publication number
IE36641L
IE36641L IE721144A IE114472A IE36641L IE 36641 L IE36641 L IE 36641L IE 721144 A IE721144 A IE 721144A IE 114472 A IE114472 A IE 114472A IE 36641 L IE36641 L IE 36641L
Authority
IE
Ireland
Prior art keywords
squeezing
tube
squeezing rollers
film
passed
Prior art date
Application number
IE721144A
Other versions
IE36641B1 (en
Original Assignee
Horsens Plasticvarefab As
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Horsens Plasticvarefab As filed Critical Horsens Plasticvarefab As
Publication of IE36641L publication Critical patent/IE36641L/en
Publication of IE36641B1 publication Critical patent/IE36641B1/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F8/00—Chemical modification by after-treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C61/00—Shaping by liberation of internal stresses; Making preforms having internal stresses; Apparatus therefor
    • B29C61/06—Making preforms having internal stresses, e.g. plastic memory
    • B29C61/08—Making preforms having internal stresses, e.g. plastic memory by stretching tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0018—Combinations of extrusion moulding with other shaping operations combined with shaping by orienting, stretching or shrinking, e.g. film blowing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0019—Combinations of extrusion moulding with other shaping operations combined with shaping by flattening, folding or bending
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • B29C48/10—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels flexible, e.g. blown foils

Abstract

1390430 Biaxially stretched films HORSENS PLASTIC AS (HORSENS PLASTICVAREFABRIK AS) 27 July 1972 [21 Aug 1971] 35196/72 Heading B5B Biaxially stretched films, which may be heatshrinkable are made from a tube of plastics film supplied by an extruder 1, a gaseous pressure medium being introduced into the interior of the tube in the first stage, e.g. through tube 6, and the inflated tube being then compressed locally by means of two sets of squeezing rollers 4 and 5 provided between the extruder nozzle 2 and the take-up roller 11 and running at different peripheral speeds, so that there are formed an intermediate bubble 10 and two outer bubbles 7 and 9, the set of squeezing rollers 5 remote from the annular nozzle being passed towardx the squeezing roller set 4 closer to the said nozzle or conversely, directly after the three bubbles have been produced, so that the gas pressure in the intermediate bubble increases and the bubble is distended in the transverse direction. As shown, the squeezing roller sets are arranged one above the other, and preferably the upper set of squeezing rollers is passed such a distance downwards that the pressure in the intermediate bubble is brought up to 14 p.s.i. (1À5 kilo pond/cm.<SP>2</SP>). An alternative apparatus (Fig. 6, not shown), is adapted for horizontal extrusion. Where polyolefin film is used the upper set of squeezing rollers is passed such a distance downwards that the ratio of stretching of the film in the transverse direction will be the same as in the longitudinal direction, preferably 5 : 3. The movement of the squeezing rollers may be effected by means of a separate conveyer unit 15 including a platform 16 containing a rectangular opening 17 in which the squeezing roller set is mounted. The unit 15 may be moved along the four screwthreaded rods 18 by the operation of of the chain wheel 27 driven by motor 28, which engages the endless chain 26 which is connected to four chain wheels 25 mounted on the under side of the platform 16. The stresses imparted to the film by stretching may be such that subsequent reheating to about 75‹ C. causes both longitudinal and transverse shrinking. [GB1390430A]
IE1144/72A 1971-08-31 1972-08-17 A method of manufacturing biaxially stretched plastics films and an apparatus for carrying the method into effect IE36641B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DK426371AA DK125973B (en) 1971-08-31 1971-08-31 Method for continuous production of biaxially stretched shrink films and apparatus for performing the method.

Publications (2)

Publication Number Publication Date
IE36641L true IE36641L (en) 1973-02-28
IE36641B1 IE36641B1 (en) 1977-01-19

Family

ID=8131863

Family Applications (1)

Application Number Title Priority Date Filing Date
IE1144/72A IE36641B1 (en) 1971-08-31 1972-08-17 A method of manufacturing biaxially stretched plastics films and an apparatus for carrying the method into effect

Country Status (12)

Country Link
JP (2) JPS4834969A (en)
BE (1) BE788153A (en)
CA (1) CA975516A (en)
DE (1) DE2240903C2 (en)
DK (1) DK125973B (en)
FI (1) FI55142C (en)
FR (1) FR2150917B1 (en)
GB (1) GB1390430A (en)
IE (1) IE36641B1 (en)
NL (1) NL180290C (en)
NO (1) NO137428C (en)
SE (1) SE422175B (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5350772Y2 (en) * 1975-01-23 1978-12-05
JPS5412057Y2 (en) * 1977-11-11 1979-05-29
CH641400A5 (en) * 1979-07-26 1984-02-29 Tetra Pak Dev METHOD FOR PRODUCING A STRETCHED PLASTIC FILM WITH BIAXIAL MOLECULE ORIENTATION.
JPS59102249U (en) * 1982-12-24 1984-07-10 株式会社アーレスティ Core extraction device in die casting casting
JPS62249721A (en) * 1986-04-23 1987-10-30 Mazda Motor Corp Apparatus for producing arc-shaped hollow plastics component
JP2617358B2 (en) * 1989-09-22 1997-06-04 松下電工株式会社 How to remove molded products
US20120298250A1 (en) * 2010-02-10 2012-11-29 Sumitomo Electric Fine Polymer, Inc. Heat-shrinkable tube, and production method and production apparatus thereof
US8828514B2 (en) 2010-02-26 2014-09-09 Sumitomo Electric Fine Polymer, Inc. Fluororesin tube and rotary member for fixing device
JP5407046B2 (en) 2010-03-08 2014-02-05 住友電工ファインポリマー株式会社 Heat-shrinkable resin tube and rotating body for image forming apparatus
CN112584921A (en) * 2018-08-30 2021-03-30 京瓷株式会社 Rotating member, member for kneading machine, kneading machine using the member, bearing, and bearing unit using the bearing
CN110039758B (en) * 2019-05-23 2023-12-26 江苏鼎尚电子材料股份有限公司 Air supplementing mechanism for heat shrinkage tube production
CN113715313B (en) * 2021-09-27 2023-12-01 哈尔滨鹏程新材料科技股份有限公司 Co-extrusion film blowing machine for producing food packaging composite bags
CN114905715B (en) * 2022-02-11 2023-04-18 宿迁市金田塑业有限公司 Preparation process and production equipment of biaxially oriented polypropylene dual-heat green protection film

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3466356A (en) * 1966-10-27 1969-09-09 Celanese Corp Method and apparatus for making plastic film

Also Published As

Publication number Publication date
NO137428B (en) 1977-11-21
SE422175B (en) 1982-02-22
BE788153A (en) 1972-12-18
JPS4834969A (en) 1973-05-23
IE36641B1 (en) 1977-01-19
DK125973B (en) 1973-05-28
JPS5839877Y2 (en) 1983-09-08
NL180290C (en) 1987-02-02
DE2240903C2 (en) 1983-10-27
NO137428C (en) 1978-03-01
GB1390430A (en) 1975-04-09
FR2150917A1 (en) 1973-04-13
DE2240903A1 (en) 1973-05-10
JPS5655623U (en) 1981-05-14
FR2150917B1 (en) 1976-09-17
NL180290B (en) 1986-09-01
NL7211856A (en) 1973-03-02
SE8105125L (en) 1981-08-31
FI55142B (en) 1979-02-28
CA975516A (en) 1975-10-07
FI55142C (en) 1979-06-11

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